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sites as well, considering the quality of service, etc..
Here, for the introduction of proposition 4.2 we
presuppose:
1. We can sort the websites
in descending
order of their relative service quality.
2. For simplicity, let
Proposition 4.2. Let Q[S] (c,ω
k
,t) =
(c,t), 0 < ρ ≤ 1,
.
1. ρ = 1, we have
2. ρ ≠ 1, we have
Here, ω
1,
ω
2
, …, ω
k
, … denotes the sorting of the
websites
in descending order of their ...